"Police are providing support to her family including her husband, who was at the festival with her."

Last year Ellie Rowe, 18, from Glastonbury in Somerset, died at the festival after taking the horse tranquilliser ketamine.

A spokeswoman for the festival said: "BoomTown fair would like to express their sincerest condolences to the family of the young woman who was found unconscious on site but despite the efforts of all our staff involved she was later pronounced dead shortly after arriving at Winchester hospital.

"Our thoughts are with all her loved ones at this tragic time and the festival is doing all it can to assist those involved."

The festival, which runs from August 7 to 10, saw the likes of Jimmy Cliff, The Wailers and Shaggy take to the stage.